Humidifier for heaters



R. N. MURPHY.

HUMIDIFIER FOR HEATERS. MPLPCATLON H LED APRJI. I919. RE NEWED APR. 22.I922- 1,419,582. Patented June 13, 1922.

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r ar HUMIDIFIER FOR HEATERS.

Specification of Letters Patent.

Patented June 13, 1922.

Original application filed September 25, 1918, Serial No. 255,700.Divided and this application filed April 21, 1919, Serial No. 291,709.Renewed April 22, 1922. Serial No. 556,117.

To all whom it may concern Be it known that 1, ROBERT NICHOLAS MURPHY, asubject of the King of Great Britain, and resident of the city ofOttawa, in the Province of Ontario, Dominion of Canada, have inventedcertain new and useful Improvements in Humidifiers for Heaters, of whichthe following isa specification.

This invention relates to improvements in humidifiers for heaters, andforms a divisional application to my application for heaters, Serial No.255,700, file-d Sept. 25th, 1918, and the object of the invention is topermit of the air or other heating fluid passing through the heatertaking up the desired amount 0 moisture to give the best heatingresults.

With the above object in view the invention consists essentially of theimproved con struction hereinafter described and set forth in thefollowing specification and accompanying drawing forming part of thesame.

In the drawing:

Figure 1 is a vertical section of a hot air heater showing my improvedhumidifier mounted therein.

Figure 2 is a transverse section through the heater and humidifyingapparatus.

Like characters of reference refer to like parts in the several figures.

Referring to the drawing, a heater A of the hot-air type is providedwith a passageway 15 between the combustion chamber 10, the fire pot 11and the outer jacket or wall 14:, and an inlet conduit 25 is providedthrough which a supply of air is delivered into the passageway 15. Inthis heater the humidifier consists of a transverse pipe 26communicating with the passageway 15 at the upper end thereof, the saidpipe being formed with a depending tube 27 closed at the bottom end andformed with a clean out plug 28.

This depending tube is provided with an inlet conduit 29 intermediate ofits height and the air passing through the conduit 29 impinges on thebaflle wall 30, so that 1t is caused to flow across the top of theliquid 31 contained in the tube 27. i

This liquid is preferably water and is maintained at a predetermined andconstant height by means of a reservoir 32 which is connected throughthe pipe 83 to the tube 27 When this furnace is in use the air entersthe conduit 25 and when heated ascends the passageway 15, is caused toflow over the surface of the water or other liquid in the tube 27, andtakes up the desired amount of moisture therefrom, and this moistenedair travels upwardly through the tube 27 into the pipe 26 and thenceinto the passageway 15 and may be discharged therefrom through anysuitable conduit.

The air on its passage through the tube 27 and pipe 26 is adequatelyheated and this air commingles with the air which passes! through thepassageway 15 and is heated therein, so that the air ultimatelydischarged from the heater will have the desired amount of moisture.

Air is forced through the conduit 29 and across the surface of the waterin the pipe 27, and then upwardly through the pipe 27 into the pipe 26,and in this case the air and steam pass through a relatively hot zoneand become heated to a very high degree before being delivered from thepipe 26 into the passageway 15, so that the temperature of the air willbe at the proper degree, and the humidity such as is designed to giveexceptionally good results in heating systems.

From this description it will be seen that I have invented a humidifierwhich is of simple construction, not liable to go out of repair, and inwhich the amount of water vaporized is controlled by the intensity ofthe heater, so that the amount of humidity taken up will not be inexcess to the heat of the air circulating through the heater.

As many changes could be made in the above construction, and manyapparently widely different embodiments of my invention, within thescope of the claim, constructed without departing from the spirit orscope thereof, it is intended that all matter contained in theaccompanying specification and drawing, shall be interpreted asillustrative and not in a limit ipg sense.

What I claim as my invention is:

In a hot-air furnace, a fire pot, an air passageway surrounding the firepot, an inlet for the air passageway, an outlet for the air passageway,a transversely extending pipe connecting opposite sides of the airpassageway, a pipe depending from the transversely extending pipe andhaving a closed lower end forming a water receptacle, a branch pipeconnecting the air passageway with the depending pipe, and a baffle walloverhanging the end of the branch pipe to direct the air downwardly overthe water in the depending pipe.

h Injl witness whereof I have hereunto set my ROBERT NICHOLAS MURPHY.

